Improvement in thrashing-machines



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Thrashing-Machines. N0. 140,491, I Patentedjulyhl873.

AM PHOTD'LITHOGRAPHIC 00. IV. flossams H2005) UNITED. STATES PATENT QFFICE.

JOHN ELLIS AND NATHAN HOFFM N, OF'EAST COVENTRY, AND JAMES LEE, OF rOTTsTowN, PENNSYLVANIA.

IMPROVEMENT IN THRASHlNG-MACHINES.

Specification forming part of Letters Patent No. 140,491, dated July 1, 1873; application filed May 9, 1873.

- construction and arrangement of a thrasher and cleaner, as will be hereinafter more fully set forth.

In order to enable others skilled in the art to which our invention appertains to make and use the same, we will now proceed to describe its construction and operation, referring to the annexed drawings, in which- Figure 1 is a side elevation, and Fig. 2 a longitudinal vertical section, of our machine. Figs. 3 to 8 are enlarged views of certain detached parts of the same.

A represents the frame of the machine, at one end of which is the feed table B. (J represents the thrashing-cylinder, constructed in any of the known and usual ways, and securely attached to a shaft, a, with which it revolves. Upon each end of the thrashingcylinder are secured wings or fans d d, each of which is cast with an ear, 0, by which it is fastened to the cylinder in such a manner as to leave a space between the ends of the cylinder and the fans for a part of the casing to fit into. Upon one end of the cylinder-shaft ais a loose pulley, I), connected by a belt, f, with a large wheel, D, upon the Shaft h, and from which said loose pulley thus receives its motion. The outer end of the loose pulley bis recessed, and in this recess are placed two pawls, i t, or their equivalents, which work in a ratchet-wheel formed on the inner side of a cap, m, screwed on the end of the shaft a, and

cylinder and fan attached to the same; and, when the machine is stopped, the blast of the fan is continued for some time, by the momentum of the cylinder, after all the other parts are at rest, thereby keeping the sieves clear of chaff and dirt.

Erepresents the casing over the thrashingcylinder (J, and in which there is a dust conveyer, G, extending forward over the feedtable B, so as to take in, by suction from the fans (I d, all the dust arising at this point, and convey it, through side-passages n a, into a casing, 19, on each side. 'In the casings p p the fans at d revolve, and, after drawing the dust into said casings, the fans force the same, through flues r '1', into a main flue, H, in the lower part of the frame. Each of the flues r is provided, on the outer side, with a valve, 8; and the two fines and valves are surrounded by a bail, t, as shown. On one of the valvess is a rod, 1;, passing through the end of the bail, and on this rod is a spiral spring, w, and nut w. Byadjusting this nut 00 the pressure of the spring w is regulated, so as to hold the valves 8 8 closed up to a certain pressure from the inside but any excess of pressure of the blast will open the valves, and allowa portion of the air to escape.

The grain and straw, after being thrashed by the cylinder 0, passes onto the shaker, I, 0perated by a pitman, J, from one of the two cranks on the main shaft h. This shaker is made of a plate of sheet metal, perforated with a number of semicircular openings, each hav ing a lip, y, turned upward and inclined forward, so as to allow the straw to pass easily over the same, while the grain falls down through the perforations onto a closed bottom, K, underneath. This bottom is supported upon double hangers z z, and operated by a pitman,L, from the other of the two cranks onv the main shaft h.

The object of this bottom K is to move the grain back to the cleaner after it has passed through the shaker I, an inclined conductingboard, M, being fixed opposite the lower end of the bottom K to conduct the grain onto the sieve N in the vibrating shoe 0. The sieve N is made in the form of stair steps or BMhdibll cataract, and is perforated, each perforation having a lip, a, turned down and toward the blast, so as to receive it through the holes more freely. The main or bottom flue H enters the front end of the shoe 0, so as to conduct the blast to the sieves. Below the cataract or stepsieve N is an ordinary sieve, 1?, and,-below the same, the bottom B of the shoe. The front end of the shoe 0 is pivoted in the center, and the rear end is vibrated by means of a crane, b, one end of which is attached to, and operated by, the the bottom K.

The crane b,at the same time as it giveslateral motion to the shoe and sieves, also guides the bottom K, so as to avoid friction against the sides. In the bottom It of the shoe 0 is a sliding-screen box S, provided with screen (1 and opening 0 for emptying the same.

The grain is intended to be taken, through a conveyer, T, and up through an elevator, V, to be emptied in bags or other suitable receptacles.

Having thus fully described our invention,

what we claim as new, and desire to secure by Letters Patent,is-

1. The fan blades 01 cl, with ears 0 0 attached to the ends of the thrashing-cylinder, and leaving spaces between said cylinder and the fans, all substantially as and for the purposes herein set forth.

2. The combination, in the dust-conveyer G, of the passages n n, fan-casings p p, side flues r a", and main or bottom flue H, all substantially as and for the purposes herein set forth.

3. The combination, with the flues 1" 'r of the dust-conveyer, of the valves 8 s, bail t, rod '0, spring 10, and nut 00, substantially as and 'for the purposes herein set forth.

In testimony that we claim the foregoing as our own, we afiix our signatures in presence of two witnesses.

JOHN ELLIS. NATHAN HOFFMAN.

Witnesses: JAMES LEE.

D. F. REiNERT, JEssE HUNSBERGER. 

